Peregrine Semiconductor announced the addition of the UltraCMOS PE41901 image reject mixer into its growing portfolio of high-frequency RF SOI products. The monolithic microwave integrated circuit (MMIC) provides a reliable, repeatable and consistent solution for frequency mixing applications, making it ideal for test and measurement systems and Ku-band earth terminals such as very small aperture terminal (VSAT) and point-to-point communication systems.
Image reject mixers provide an integrated phase-cancelling capability by removing the unwanted image signal from the output. This type of mixer reduces the number and complexity of the filters required in a system, resulting in minimised board space and design effort. The PE41901 is Peregrine’s first image reject mixer and its first mixer at high frequencies.
The chip integrates two mixers, a local oscillator (LO) path 90-degree coupler and RF port baluns on a single die. Integrating these functions provides good image rejection, reduces LO leakage and improves LO to RF isolation. This mixer operates with single-ended signals on the RF and LO ports, and it can be used as an up-conversion or down-conversion mixer. It supports a broad RF frequency range of 10 to 19 GHz.
The intermediate frequency (IF) port accepts broadband quadrature signals from DC to 4 GHz, while the LO port covers a frequency range of 12 to 19 GHz. The PE41901 delivers high LO to RF isolation of 38 dB and LO to IF isolation of 23 dB. It has high linearity of 21 dBm IIP3, low conversion loss of 10 dB and achieves image rejection of 25 dB. No external blocking capacitors are required if 0 Vd.c. is present on the LO or RF pins.
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